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| author | Denis Efremov <efremov@linux.com> | 2020-09-21 17:28:50 +0200 |
|---|---|---|
| committer | Julia Lawall <Julia.Lawall@lip6.fr> | 2020-09-21 19:45:46 +0200 |
| commit | b76f0ea013125358d1b4ca147a6f9b6883dd2493 (patch) | |
| tree | 0cc7e0f356310061ee86d6de2e5723fe87bdd30f /scripts | |
| parent | scripts: coccicheck: Improve error feedback when coccicheck fails (diff) | |
| download | linux-b76f0ea013125358d1b4ca147a6f9b6883dd2493.tar.xz linux-b76f0ea013125358d1b4ca147a6f9b6883dd2493.zip | |
coccinelle: misc: add excluded_middle.cocci script
Check for !A || A && B condition. It's equivalent to !A || B.
Signed-off-by: Denis Efremov <efremov@linux.com>
Signed-off-by: Julia Lawall <Julia.Lawall@inria.fr>
Diffstat (limited to 'scripts')
| -rw-r--r-- | scripts/coccinelle/misc/excluded_middle.cocci | 39 |
1 files changed, 39 insertions, 0 deletions
diff --git a/scripts/coccinelle/misc/excluded_middle.cocci b/scripts/coccinelle/misc/excluded_middle.cocci new file mode 100644 index 000000000000..ab28393e4843 --- /dev/null +++ b/scripts/coccinelle/misc/excluded_middle.cocci @@ -0,0 +1,39 @@ +// SPDX-License-Identifier: GPL-2.0-only +/// +/// Condition !A || A && B is equivalent to !A || B. +/// +// Confidence: High +// Copyright: (C) 2020 Denis Efremov ISPRAS +// Options: --no-includes --include-headers + +virtual patch +virtual context +virtual org +virtual report + +@r depends on !patch@ +expression A, B; +position p; +@@ + +* !A || (A &&@p B) + +@depends on patch@ +expression A, B; +@@ + + !A || +- (A && B) ++ B + +@script:python depends on report@ +p << r.p; +@@ + +coccilib.report.print_report(p[0], "WARNING !A || A && B is equivalent to !A || B") + +@script:python depends on org@ +p << r.p; +@@ + +coccilib.org.print_todo(p[0], "WARNING !A || A && B is equivalent to !A || B") |